I just replaced the Moen single handle kitchen faucet model 87316 (from Home Depot) last week, since I change to the new faucet, the water pressure has dropped dramatically, I would say only about 1/2 pressure of my old faucet. I have been remove the head and clean them, and double check both hot and cold water valves are fully open, when I turn on the water without the head, the water pressure seem normal, so I know the problem is on the head. Is my faucet have one of those flow restriction device to cause low pressure, is yes, what can I do ? Is there anyway I can remove this device ?
Thanks

By the 'head' do you mean the aerator? If so, take it apart to see if something got caught in it, try to remove the obstruction or simply replace it.

XenoSapien